Audizine Forums - C4/C5 A6/S6/RS6/allroadhttp://www.audizine.com/forum/
Discussion Forum relating to the C4 and C5 platform A6, S6, RS 6, and allroad. Sponsored by JH Motorsports.enSun, 18 Feb 2018 07:04:44 GMTvBulletin60http://www.audizine.com/forum/images/misc/rss.pngAudizine Forums - C4/C5 A6/S6/RS6/allroadhttp://www.audizine.com/forum/
A6 brake issues! Help!http://www.audizine.com/forum/showthread.php/801071-A6-brake-issues!-Help!?goto=newpost
Sun, 18 Feb 2018 04:16:16 GMTSo recently my 2.8 a6 avant has been having brake issues. Girlfriend drove the car, and told me...So recently my 2.8 a6 avant has been having brake issues. Girlfriend drove the car, and told me something was up with the brakes and it pulled really hard when she braked. Upon inspection, i thought the front single piston calipers had siezed. Very hard to turn them, so that was my first thought. Replaced both front calipers with different stock calipers. After bleeding brakes they *siezed* up as well. When driving it feels like the e brake is pulled and any acceleration then letting off the gas will slow it down rapidly and can almost come to a stop without pressing the brakes. My next thought was master brake cylinder was/is going bad. Replaced that last night, bled the brakes, same thing happens. Now the weird thing is the brakes will stick, and sometimes they wonít. When i first start the car all is well, and then itís just a matter of time before they stick/sieze. Have the brake lines to replace next as another thought.. anyone have any insight into what might be causing this?!?

*cliff notes* front brakes calipers stick. Replaced calipers and master brake cylinder. No help, still stick. Will sporadically drive normal, other times feels like e brake is pulled. Need opinions on what else to try/replace!
]]>C4/C5 A6/S6/RS6/allroadmikehawk666http://www.audizine.com/forum/showthread.php/801071-A6-brake-issues!-Help!http://www.audizine.com/forum/showthread.php/800831-Q5-Brembo-s-on-C5?goto=newpost
Fri, 16 Feb 2018 05:55:24 GMTI have a set of the Q5 Brembo's laying around. Was thinking about them on the C5 chassis. The C5 rotors are 321mm x 30mm and the Q5 rotors are 320mm x 30mm.

I couldn't find any threads with folks who have installed these on the C5 AR with 321 mm front rotors, but don't see why it wouldn't work, though I can't tell what the offset of each of the rotors is. I can see that being the only rate limiter.

I can mock them up, but wanted to see if anyone had done this yet.
]]>C4/C5 A6/S6/RS6/allroadjbain2http://www.audizine.com/forum/showthread.php/800831-Q5-Brembo-s-on-C5C5 Allroad 2.7t - Need help diagnosing this issuehttp://www.audizine.com/forum/showthread.php/800780-C5-Allroad-2-7t-Need-help-diagnosing-this-issue?goto=newpost
Thu, 15 Feb 2018 21:01:30 GMT2005 Allroad 2.7t 6 speed manual, only 92,000 miles. Basically I have this issue whenever I...2005 Allroad 2.7t 6 speed manual, only 92,000 miles. Basically I have this issue whenever I accelerate I get this shuddering/knocking feeling through the car, the only way I could describe it is that its somewhat similar to clutch judder only not as violent, it is at its worst from a stand still and is less noticeable at speed, however I can still feel it even if I accelerate at 50mph+. The shuddering increases in frequency with speed. I have been in a multi story car park and it juddered quite violently on the ramps even at a constant speed.

To get more detailed, I have zero symptoms what so ever when the car is cold. When its been driven for about 10 minutes it starts doing it, then after about 20 minutes it is at its worst. When its warm as well I can feel a noticeable "growling/vibration" with the steering on a lock and the car crawling. Again this is not an issue when the car is cold.

I have replaced both the front drive shafts after finding play in the inner CV joints, I also had the exhaust and heat shields off and inspected the centre drive shaft, there was no cracking in the rubber centre bearing, nor was there any play in either CV joint, I had read the exhaust can degrade the grease in the CV's so I did unbolt them to check and the grease seemed fine.

Not sure whether its relevant but there is a consistent code for the exhaust gas temp sensor 2 P1457 intermittent.

Whats throwing me is that there are no symptoms when the car is cold, its concerning me that there might be an issue with the gearbox and that would just be game over. My girlfriend has started using this car to commute to work, which isn't ideal anyway so we have discussed getting rid of the allroad for something less complex and more economical, I told myself if the drive shafts didn't solve the problem then I'd have to look at getting rid of the car but in all honest I really don't want to, firstly because I really like this car and had big plans for it after I complete my e36 build, secondly because I have never been defeated by a car before and I certainly don't want to start with my own car.

If anyone has any experience with this issue or can shed some light on what could be causing this problem I would really appreciate it.
]]>C4/C5 A6/S6/RS6/allroadredcheesehttp://www.audizine.com/forum/showthread.php/800780-C5-Allroad-2-7t-Need-help-diagnosing-this-issueSaving my 4.2http://www.audizine.com/forum/showthread.php/800732-Saving-my-4-2?goto=newpost
Thu, 15 Feb 2018 13:23:02 GMTBought a 1999 A6 4.2 quattro about 6 months ago for 1600 Ä. At the time as a temporary car but...Bought a 1999 A6 4.2 quattro about 6 months ago for 1600 Ä. At the time as a temporary car but having fixed a number of minor things I have really come to care for it.

A few days ago things turned bad.
Day 1: slipped in 3rd gear during acceleration. Thought it was due to slippery road or something.
Day 2: slipped in 3rd again. Got concerned.
Day 3: went into safe mode. Got scared.

]]>C4/C5 A6/S6/RS6/allroadmartinhnilssonhttp://www.audizine.com/forum/showthread.php/800732-Saving-my-4-2C5 S6 - Warm starting issue (MAF, O2, etc..?)http://www.audizine.com/forum/showthread.php/800660-C5-S6-Warm-starting-issue-(MAF-O2-etc-)?goto=newpost
Wed, 14 Feb 2018 17:04:42 GMTAbout 9-10 months ago, my S6 was having a warm engine starting problem, seemingly in warm weather....About 9-10 months ago, my S6 was having a warm engine starting problem, seemingly in warm weather. After the engine/car was shut down after driving for a while (standard operating temperature), if the car "cooled" for a bit, but the engine was still warm, starting was very difficult and it felt like a "rich" condition as the engine was trying to rev when it fired and I needed to modulate the gas pedal to get the revs up and then finally even out. It seemed like a MAF issue and my shop's OBD sensor confirmed the engine code. I replaced it and the issue cleared up.

Less than 5K miles later, the issue is back - warm engine hard starting (no issues with cold starting or hot starting as before). The other day, when it got to 60degrees in the NE area, the engine didn't even start when "warm" and I smelled gas. I have not rechecked what engine error codes may be at fault yet or touched anything yet. I just wanted to get some opinions first. I have a hard time believing that the MAF is at fault again, but I guess anything is possible. Perhaps O2 sensor? Maybe even a very dirty K&N air filter (which I'll check today)?

I have a set of 17z calipers, mounting hardware & lines and would like to use on my S6. I know that 18z will work however I rather the 17z option. Upon doing a little research I did find that the 2005 Volvo V70R Front Rotor should work if I machine off 2.5mm from caliper mounting surface?

Just confirming is anyone has done this and worked?

Thanks
]]>C4/C5 A6/S6/RS6/allroadto20vthttp://www.audizine.com/forum/showthread.php/800403-17z-on-C5-S6What is this in my center console?http://www.audizine.com/forum/showthread.php/800269-What-is-this-in-my-center-console?goto=newpost
Sun, 11 Feb 2018 05:07:15 GMTDecided to get rid of all the wood trim in my car and ended up removing the center console. The...Decided to get rid of all the wood trim in my car and ended up removing the center console. The idea was to remove the center console so I could install a cup holder I've had sitting around for years but then came across this:

It's been tested on Audi A4 (B8), Porsche Macan (2015), VW CC (2013), Q5 (2014), Subaru Outback (2012), Honda Civic (2018), etc.. to confirm its enhanced & rock-solid lighting performance without any flickering or error message being triggered.
It also passed our heavy-duty testing that requires staying lit for 30 days straight without turning off even once. Yes, it survived without any sign of defect.
That's about 720 hours of non-stop use testing.
In addition to that, it's waterproof, which we also put entire LED kit into water and its lighting performance was not bothered.
(It doesn't mean that you should use it for in-water lighting such as aquarium, etc... but you can confidently use it without worrying about any damage caused by water contact.)
With 2-year reliable warranty offered directly by HID CONCEPT, you are safely covered with reliable product.

For those who wish to view DIY install guide done on B8 A4, check out this youtube video.

If you have any questions, feel free to contact us at info@hidconcept.com or 1-888-579-5917.
Thank You,
Mike @ HID CONCEPT
]]>C4/C5 A6/S6/RS6/allroadmike@hidconcepthttp://www.audizine.com/forum/showthread.php/800169-NEW-DAMA-LED-Headlight-Foglight-Kit-Released-6000K-Pure-White-up-to-8-000-lmTrans. Problemshttp://www.audizine.com/forum/showthread.php/800041-Trans-Problems?goto=newpost
Fri, 09 Feb 2018 05:37:09 GMT04 A6 4.2l quattro. Trans started like kicking into neutral when stopped at a light.Scanned for...04 A6 4.2l quattro. Trans started like kicking into neutral when stopped at a light.Scanned for codes,no codes until I did the component actuator test then I got codes from hell.Num 0752,0757,0762,1762,1815,1820,1825,1829,1834,1745. I checked all wiring no problems,checked the tcm,no problems.Anybody had this problem,I'm thinking it has to be some controller of some kind. HELP
]]>C4/C5 A6/S6/RS6/allroadchrise1788http://www.audizine.com/forum/showthread.php/800041-Trans-ProblemsCan I do anything with the car with the instrument cluster out?http://www.audizine.com/forum/showthread.php/799986-Can-I-do-anything-with-the-car-with-the-instrument-cluster-out?goto=newpost
Thu, 08 Feb 2018 20:47:40 GMTWhile doing my front airbags I thought it would be a good time to send my instrument cluster out to...While doing my front airbags I thought it would be a good time to send my instrument cluster out to be repaired. Problem is it took the USPS 7 days to get from Michigan to Denver via priority mail. The return trip has taken 9 days so far. Tracking says it made it to a local distribution center, might end up sitting there for a few days too. So can I start and charge my air system or should I wait for the instrument cluster to come in?
]]>C4/C5 A6/S6/RS6/allroadevilhomerhttp://www.audizine.com/forum/showthread.php/799986-Can-I-do-anything-with-the-car-with-the-instrument-cluster-outAnyone have amber free headlights for sale? Or euro lights? Are Depo lights crap?http://www.audizine.com/forum/showthread.php/799977-Anyone-have-amber-free-headlights-for-sale-Or-euro-lights-Are-Depo-lights-crap?goto=newpost
Thu, 08 Feb 2018 19:40:10 GMTI should be on my way to buying that sweet stage 3+ allroad!
The only mod I need is amber-free...I should be on my way to buying that sweet stage 3+ allroad!

The only mod I need is amber-free headlights.

Does anyone have amber-free headlights for sale or OEM euro headlights for sale? Anyone know the P/N for the euro headlights?

Yup, I had to...
]]>C4/C5 A6/S6/RS6/allroadLakeTahoeQuattrhttp://www.audizine.com/forum/showthread.php/799861-Found-this-pretty-cool!2002 Amulet S6 Production numbershttp://www.audizine.com/forum/showthread.php/799793-2002-Amulet-S6-Production-numbers?goto=newpost
Wed, 07 Feb 2018 02:11:29 GMTI'm not sure if this is out there or not, but heres what Audi sent me today.

- 882 S6s sold in the United States market for the year 2002
- 38 had the exterior color Amulet Red
- 11 had the combination of the interior color Silver with the exterior color Amulet Red

-Hot or cold, auto or tip, when shifting from 2nd to 3rd there is an issue where the transmission seems like its going to shift but doesn't. Light or hard acceleration doesn't matter it's always there. Example, under light acceleration in 2nd gear the RPMs will go to 2600 and the transmission acts like it's shifting and the RPMs will drop to 2400 but the car didn't shift the RPM just dipped 200 and then once it reaches 2600 again it will actually shift.

- When in drive but at a stop the idle is fluctuating about 50-100 RPM which is causing the voltage gauge to fluctuate by 1 volt. I'm getting 12" vac pressure at this time.
- My idle in park is perfect and sits at 18" and there are no vac leaks. I replaced every vac line and PCV spider hose.
- Completely rebuilt engine with all new seals and gaskets, not leaking anything
- Only code is for an O2 heater circuit not working for bank 2, this just started a week ago
- Turbo's were replaced by PO about 5000 miles ago and I inspected them myself at rebuild and they were perfect
- Monitoring pressure from a bluetooth OBD device on my phone at WOT the boost pressure says 25psi but I'm not sure i believe that
- Transmission filter and fluid changed, no metal particles in pan
- Torque converter was not leaking when trans was separated from engine

All the below problems are only when the car is cold (it's been about 20 degrees F here every day) and if I let the car idle for 15-20 minutes none of these issues exist

- Hard downshift and clunk from 2nd to 1st
- 1st to 2nd shift will not occur until 4000 rpm
- After driving to a stop, car will surge thru light braking application then return to normal
- RPM bounce, while driving the RPMs will surge all over the map, making it difficult for the transmission to shift when it should and results in up-down-up shift

I have read that the TC could be bad and I'm prepared to pull the engine (again) and replace it. However not all of these symptoms have me convinced that it's all the TC at fault. I would like to know if anyone else has experienced anything like this and if they found the root cause. Replacing the TC isn't an issue, the issue would be replacing the TC and still having these issues.